期刊
CORROSION SCIENCE
卷 144, 期 -, 页码 163-171出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2018.08.047
关键词
AA6082 alloy; Al-Mg-Si alloy; Extrusion; Intergranular corrosion; Crystallographic pitting
资金
- UK Engineering and Physical Sciences Research Council [EP/N007638/1, EP/R001715/1]
- Innovative Foundation of Huazhong University of Science and Technology [2018KFYYXJJ124]
- EPSRC [EP/N007638/1, EP/R001715/1] Funding Source: UKRI
In the present study, the corrosion behaviour of AA6082 Al-Mg-Si alloy extrusion, consisting of a recrystallized surface region and non-recrystallized fibre structure core, is investigated. It is found that the corrosion penetration rate and propagation path are closely related to grain structure and local plastic deformation. Corrosion morphology changes from intergranular corrosion in recrystallized region to both intergranular and intragranular corrosion of the heavily deformed subgrains in non-recrystallized region. Further, local plastic deformation is quantified by electron backscatter diffraction and transmission Kikuchi diffraction and correlated to corrosion propagation path.
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